Unfortunately, my use case with the Curidas is 1 to 2 paragraphs most days with an EF nib that barely sips ink. While I use it enough for it to not clog, mines remains filled for long enough and uses little enough to really notice the evaporation issues. If I bought this pen again, I would definitely go for the medium or broad nib so I could cycle the ink quicker.
BuJo is what you make of it. Just the pretty artsy stuff on YouTube and reddit is more eye catching and brings in the views. There’s plenty of us who use it for what it was originally designed as: a highly customizable no frills organization and productivity system combined with notetaking capabilities.
My suggestion is to do a week or two with the original instructions. At the end of that period, reflect on what you liked, didn’t like, what changes you might want to try for the next 1-2 weeks, and whether you hated it so much you’re quitting. I normally use an extremely stripped down system that focuses on the day to day in my personal life since I have a hybrid system tied into Obsidian and TickTick. I realized with a few days of starting my job that I needed something more structured and capable of longer term work since I no longer had access to those programs. It took some experimenting, but I ended up going back to dedicating full pages to projects, using weekly spreads to organize at work, putting more effort into keeping my index updated, and added sticky note tabs to all the important pages I regularly jump to, like projects, today, this week, and so forth.
Hope that gives you some inspiration!